/*
 * Copyright 2011 The Rusted Roof, LLC.
 *
 *    Licensed under the Apache License, Version 2.0 (the "License");
 *    you may not use this file except in compliance with the License.
 *    You may obtain a copy of the License at
 *
 *        http://www.apache.org/licenses/LICENSE-2.0
 *
 *    Unless required by applicable law or agreed to in writing, software
 *    distributed under the License is distributed on an "AS IS" BASIS,
 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *    See the License for the specific language governing permissions and
 *    limitations under the License.
 */

package org.proteusframework.platformservice.messaging.basic;

import org.proteusframework.core.api.model.INamespace;
import org.proteusframework.platformservice.messaging.AbstractMessageSinkClient;
import org.proteusframework.platformservice.messaging.IMessageBean;
import org.proteusframework.platformservice.messaging.IMessageSinkSubscriber;

import java.util.Properties;
import java.util.concurrent.TimeUnit;

final class QueueSubscriber<T extends IMessageBean> extends AbstractMessageSinkClient<T> implements IMessageSinkSubscriber<T>
{
    private final BlockingQueueMessageSink<T> mySink;

    QueueSubscriber(INamespace namespace, Properties metadata, BlockingQueueMessageSink<T> messageSink)
    {
        super(namespace, metadata, messageSink);
        this.mySink = messageSink;
    }

    @Override
    public T receiveImmediate()
    {
        return mySink.getQueue().poll();
    }

    @Override
    public T receiveInterval(long milliseconds) throws InterruptedException
    {
        return mySink.getQueue().poll(milliseconds, TimeUnit.MILLISECONDS);
    }

    @Override
    public T receiveIndefinite() throws InterruptedException
    {
        return mySink.getQueue().take();
    }
}
